CHEM 210 FINAL EXAM STUDY GUIDE QUESTIONS AND ANSWERS WITH CORRECT SOLUTIONS 100% / LATEST UPDATED 2025/2026

CHEM 210 FINAL EXAM STUDY GUIDE
QUESTIONS AND ANSWERS WITH
CORRECT SOLUTIONS 100% /
LATEST UPDATED 2025/2026

How many electrons can a single orbital hold?
A) 2n
B) 2
C) 2l+1
D)8 - CORRECT ANSWES -- B) 2


What is ground state electron configuration of Co?
[Ar]3d^9
[Ar]4s^1 3d^8
[Ar]4s^2 3d^7
[Ar]4s^2 4p^6 4d^1 - CORRECT ANSWES -- [Ar]4s^2 3d^7

molybdenum has an anomalous electron configuration. using the shorthand notation for
electron configurations, write the electron configuration
A) [kr]5s 4d^6
B) [kr]5s 4d^0 5p^6
C) [kr]5s^1 4d^5
D) [kr]5s^2 4d^4 - CORRECT ANSWES -- C) [kr]5s^1 4d^5

the symbol [Kr] represents
a) 4s^2 4p^6
b) 1s^2 2s^2 2p^6 3s^6 4s^2 4p^6
c) 1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6
D)1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6 4d^10 - CORRECT ANSWES -- c) 1s^2 2s^2
2p^6 3s^6 4s^2 3d^10 4p^6

What is the wavelength of UV light in the balmer series when m=2 and n=7?
a) 0.00252 nm
b) 397 nm
c)337 nm
d)0.00297 nm - CORRECT ANSWES -- b) 397 nm
What are the possible values of I and m1 for an electron in a 5d orbitial?
A) I=0 and mI=0

, B) I=3 and MI=-2,-1,0,+1, or +2
c) I=1 and MI=-1,0,+1
D) I=2 and MI=-2,-1,0,+1, +2 - CORRECT ANSWES -- D) I=2 and MI=-2,-1,0,+1, +2

What is the the de Broglie wavelength of an electron (m=9.11e-31 kg) moving at a
velocity of 3.0e7m/s?
a) 3.9e-12
b)2.4e-11
c)3.3e-8
d)1.1e-4 - CORRECT ANSWES -- b)2.4e-11

What is the frequency of a helium-neon laser light with a wave of 632.8 nm?
a) 4.47e14 s-1
b)4.47e5 s-1
c)2.11e-15 s-1
d)1.58e-15 s-1 - CORRECT ANSWES -- a) 4.47e14 s-1

What is the correct nuclear symbol for the unknown product "X" in the nuclear equation
shown below?
A)234
TH
90
B) 226
Ra
88
C) 234
U
90
D) 242
Pu
94
E) 234
Pu
94 - CORRECT ANSWES -- A)234
TH
90

The alpha particle is
A)1
1H
B)2
1H
C)3
1H
D)4
2 He - CORRECT ANSWES -- D)4